Kwa kiingereza tunasema "One man's trash is another man's treasure," maana yake, kilichotupwa na mtu mmoja, kinaweza kutumikia mwingine na kuwa na thamani kwake.

Msemo huu hutumika ili kueleza jinsi mapendeleo ya watu hutofautiana, ama kuonyesha matumaini kwamba wanadamu ni wabunifu katika masuala ya kupanga upya au kuchakata vitu vilivyotupwa na wengine.

Kwa mfano, mjasiriamali Gibson Kiwago, mwanzilishi wa WAGA Tanzania, anachakata betri za laptop ili kuleta umeme kwa nyumba na maduka. Jifunze zaidi kuhusu E-Waste (Orodha ya Kusoma)!

Dhana kwamba thamani ya kitu hutegemea mtazamo wako ipo tangu zamani. Chimbuko cha msemo huu ni methali ya Kiingereza iliyotumika karne ya 17:

Je umewahi kuona thamani katika kitu kilichotupwa na mwengine?

na Nankya Sauda 🇺🇬
Shindano la Insha ya Methali 🏆
Mshindi wa Kwanza 🥇

Umewahi kuchukua muda na kujiuliza kwa nini wazee huwa wana busara zaidi kuliko vijana? Je, umewahi kuchukua muda wa kutafakari asili yako ulipochipuka? Ikiwa sivyo, [sasa] ni wakati mzuri wa kuanza kutafuta asili yako kwa sababu ni muhimu mtu ajue mizizi yake.
   Baada ya muda, unachukua mzigo wa kufunua asili ya watu mashuhuri wenye akili na haiba zao, utakuja kutambua kwamba wao ni introverts (yaani wakimya, wanaopenda kukaa peke yao/kujitenga) lakini ni mashuhuri. Ni muhimu uchukue muda wako, hata ukiwa bize, ujifunze kuhusu wasomi mashuhuri kama Albert Einstein, mwanasayansi mashuhuri ambaye alisema nukuu inayotuelimisha:

Hii inamaanisha kwamba wakati ukiwa peke yako ni nafasi ya kujitafakari, lakini pia ni nafasi ya kutumia akili yako bunifu. Wanasema wazungumzaji wakubwa ni wanasheria wazuri, na tumeona hayo katika maisha yetu ya kila siku ambapo watu hutoa ahadi tupu, hutoa matamko ya uwongo ili kuwapendeza waliomzunguka bila kuchukua muda wa kufanya kitu kwa nia ya kutekeleza maneno yao. Kwa sababu hiyo, wengi wamepoteza imani na hawa wanaoitwa “wazungumzaji wakubwa.”
   Kwa upande mwingine, wakimya hutushangaza kwa matendo yao. Hatua zao hupangiliwa kila mara, matamanio yao ni wazi na vitendo vyao hufanyika kwa kusudi. Wapenzi wakimya hukuza mahusiano yao ya kimapenzi kwa ubunifu mpya ili kudumisha mahusiano. Waliowaajiri [wakimya] na waliokaa karibu na introverts husema kuwafahamu ni moja ya mafanikio makubwa katika maisha yao, ndo maana hawa wamefanya kazi nadhifu zaidi, wakawa na vipindi vyao vya kutafakari peke yao, na hatimaye walitoa kazi bora na kupata cheo kikubwa.
   Tunaweza kufafanua methali kama misemo inatumika katika nchi au utamaduni fulani. Ni maneno mafupi yenye busara na hutoa ushauri na vile vile kuongeza wazo kuhusiana na maisha ya kila siku. Kwa kweli, ili kufahamu kwa kina mila na desturi za kitamaduni, ni vizuri warejelee methali kwani zinaweza kuwa na maana pana ndani. 
Kihistoria, methali "Still waters run deep" (Maji yalotulia ndo yenye kina kirefu/Usicheze maji yanayosimama) inatoka Kilatini cha kale. Ilipata umaarufu baada ya Shakespeare kuitumia katika tamthilia yake ya Henry VI mwaka 1590. Alisema:

Tunatambua kwamba, mara nyingi watu hatari zaidi walio na roho mbaya hupanga hatua zao na kuchukua hatua kwa wakati ambao wengine hatarajii. Ndio maana usaliti hutoka kwa watu ambao hatutarajii [kitu kama hicho] kutoka kwao. Kwa hiyo ni muhimu kwa mtu kuchukua si tu yale yanayokutana na macho bali pia kuchukua tahadhari hasa kutoka kwa watu ambao hawalipizi kisasi mara tu baada ya kukasirishwa au kukabiliwa.
   Albert Einstein licha ya tabia yake ya kujittenga, yeye anajulikana sana kwa kubuni nadharia yake ya relativity ambayo ilileta mapinduzi katika uelewa wetu wa nafasi ya nje, wakati, na kanimvutano (gravity).
   Kwa kumalizia, ni muhimu sana kutofikia hitimisho [haraka] kwa sababu sura hudanganya na kuna mengi ya kujua na kugundua kuliko macho yanavyoweza kuona.

Tofautisha na linganisha matunda na pipi. Matunda yameiva, yana ladha halisi, yamejaa virutubisho na vitamini -- kweli yanajiuza yenyewe.

Kwa upande mwingine, mfuko wa pipi unalia “nisikilize!”, kwa rangi kali, na kauli mbiu zinazolipuka *BOOM*! Lakini chini au nyuma ya kinachong'aa, tunajua kwa kkweli pipi ni sukari tupu tu yenye rangi na ladha bandia ya matunda.

Kama nyani, binadamu hupenda matunda kwa sababu yanatupatia nishati pamoja na lishe na virutubisho. Pipi hutoa nishati bila lishe halisi (Kalori tupu). Pipi huiga tunda. Usidanganywe!

Kizuri hakihitaji kutangazwa, maana ubora hujieleza yenyewe. Kama wachumi wasemavyo, “demand” inazidi “supply”. Matangazo yanaweza kutuahidi furaha, uzuri, upendo, mali au heshima. Lakini jiulize, je, inawezekana kwa kweli? Coca-Cola sio dawa ya upendo.

Methali hii inatukumbusha thamani ya ubora wa kweli kuliko muonekeano maridadi. Methali hii hutumika wakati msemaji ana mashaka juu ya mtu anayejisifu au kujivunia kupita kiasi.

Tuwe kama kikapu cha matunda: mwazi na mwema. Sifa hizi zitawavuta wengine kwako — angalau wao wanaoelewa kwamba “Chema chajiuza, kibaya chajitembeza!”

Methali zinazohusiana:
Vingaravyo vyote si dhahabu

Don’t judge ya book by it’s cover
Usihukumu kitabu kwa kava yake (muonekeno)

Appearances are deceptive
Maonekano hudanganya
 
高嶺の花
Hana yori dango
Chakula [ni bora] kuliko maua

Today's proverb is often used in Swahili to describe a person who makes a mistake that could have been foreseen and suffers negative consequences... like the truck driver in this picture from Oxfordshire, UK. Regardless of what your parents taught you (or failed to teach you), you will eventually have to confront the harsh realities of life and learn from experience.
See also: If a child cries for a razor, give it to him (Mtoto akilia wembe, mpe)

He who is not taught by his parents is taught by the world. (Asofunzwa na wazazi, hufunzwa na ulimwengu)
Here's a poem by the poet Akilimali Snow-White about this proverb. (My translation from the original Swahili)

In the age they fooled me, my old folks in raising me,
I failed to learn the new movements of the world.
Today I please myself, to the people of the world, listen:
He who is not taught by his parents, is taught by the world.

I couldn’t have done any work without humbling myself before them,
Obeying to flatter them, then to serve them,
Even when I pleased them, they taught me with intention,
He who is not taught by his parents, is taught by the world.

Now I can speak European languages without difficulty,
like English and others too,
With effort I learn, and even they have raised me.
He who is not taught by his parents, is taught by the world.

I can converse without blemish,
And lead amidst evil, removing the blemish,
In the end the place pleases, one step towards harmony,
He who is not taught by his parents, is taught by the world.

There is nowhere I have overlooked, without investigation,
All sides examined, knowledge I have taken,
I even know how to sell products and buy,
He who is not taught by his parents, is taught by the world.

The amount which I have learned, not a little by fumbling,
I am pleasing where I come from, I employ good work
It’s hard to scorn, how it raises me,
He who is not taught by his parents, is taught by the world.

It’s not right to ignore what you don’t know
Try to investigate, and then analyze,
When your intention is tightened, you can’t fail to know a thing,
He who is not taught by his parents, is taught by the world.

The tasks I taught myself, my father didn’t know
He didn’t know English, or selling and buying,
but only praising oneself, that was when I, the child, knew,
He who is not taught by his parents, is taught by the world. 

I give more for you, you all who helped me,
All of you who’ve taught me, Lord give you health
God fill you all with happiness, and return goodness to you,
He who is not taught by his parents, is taught by the people of the world.
- Diwani ya Akilimali

What do you think about this poem? What does it mean? Can you improve the translation?

Fikeni E. M. K. Senkoro (1988) wrote of this poem (my translation):