Little Stories for Big Understanding, from someone else

Not exhaustive, of course! Double bars are Discord spoiler tags, for your usage convenience.

Positive Sayings From the Books and Other Sources

• K'atini! ||Endure!||
  (Meant as encouragement.)

• K'oyacyi. ||Stay alive.||
  (A gentle command, meant to encourage or as a toast.)

• Kandosii! ||Awesome!||
  (Has this or similar meaning when used as encouragement.)

• Oya! ||Hooray!||
  (One of many similar meanings, always positive.)

• Oya manda! ||Live Mando!||

• Aliit ori'shya tal'din. ||Family is more than blood (line).||

• Mishuk gotal'u meshuroke, pako kyore. ||Pressure makes gems, ease makes decay.||

• Verd ori'shya beskar'gam. ||A warrior is more than armor.||
  (Sometimes abbreviated as "VOB.")

• Ke nu jurkadir sha mando'ade! ||Don't mess around with Mandalorians!||

• Nu jurkad Mando'ade, burc'ya! ||No messing around with Mandalorians, friend!||
  (Words of encouragement, as opposed to the warning of the above phrase.)

• Ret’lini. ||Backup plan.||
  (To quote 501st: "a Plan B, the classic Mando mind-set of always being ready for the worst.")

• Pakalat, Kar'tayl, Mando'a. ||Wit, Knowledge, Language.||

• Munit tome'tayl, skotah iisa. ||Long memory, short fuse.||
  (Typical Mando mindset, but probably not a socially productive one.)

• Kaysh meg miit'gaana, oyacyi. ||Who writes, remains.||

• Nu kyr'adyc, shi taab'echaaj'la. ||Not gone, merely marching far away.||

• Ni su'cuyi, gar kyr'adyc, ni partayli, gar darasuum. ||I'm still alive, you're dead, I'll remember you, so you're eternal.||
  (For rememberance of the dead.)

• Gar taldin ne jaonyc; gar sa buir, ori'wadaas'la. ||Your bloodline isn't important; you as a parent are very valuable.||

• Ib'tuur jatne tuur ash'ad kyr'amur. ||Today is the best day for someone else to die.||

More sayings and phrases: https://starwars.fandom.com/wiki/Mando%27a/Legends#Phrases

From the Oyu'baat

• Kar'am ra kyr'am. ||Live or die. If you aren't changing, you're dead.||

• Gotal’u dajune sa burc’yase: birov bal serim. ||Make plans like friends: many and true.||

• Anay solyc dajun shekemi de t’ad’yc. ||Every first plan is followed by a second.||

• Ke’cuy jate bal burcya’la. Jate’shya ib’tuur, jatne nakar’tuur. Ke mandokarla. ||Be good and friendly. Better today, best tomorrow. Be the epitome of Mando culture.||

• Ke drashaa jahaala. ||Grow healthy. You better have a good life if you know what's good for you.||

• Gar ruyot nu jaon'yc; kando'shya meg nari ti jiila ca'nara. ||Your past isn't important; more weighty is what you do with (the) immediate time.||

• K'atini shi! ||Just endure!||
  (Meant as encouragement.)

• Trattok’or, tsikador tug’yc. ||Fall down, get back up again.||

• Uraktone akaane o'r mirshe. ||The most difficult wars are in the brain.||

• Ke cuyir nare bal miite, bal k’atini! ||Be your words and actions, and be tenacious!||

• Meh ni ramaana, vercopa ramaanar tsikala. ||If I die, I hope/wish to die prepared.||

• Kebbur bal vorer ne'bralov jate'shya draar kebbur. ||Trying and accepting failure is better than never trying.||

• Cuyi muun bal shuku. Cuyi kotyc bal cuyani. Ke cuyi sa kal: muun eso bal pel petir. ||Be hard and break. Be strong and survive. Be like a blade: hard side and soft center.||

• Ori'uram, kih'miite. ||Big mouth, small words.||

• Ke partayli uur. ||Remember silence.||

• Trikaryc hibrar, briikase verd. ||Sad student, happy warrior.||

• Verd ori'shya beskar'gam, a shi beskar'gam atinii. ||A warrior is more than the armor, but only the armor endures.||

• Urakto ba'jur, pakod parjaise. ||Difficult education, easy victories.||

• Aliit cuyi burc’yase meg mhi vore vaal mhi taabi. ||Family exists as the friends that we accept while we march — family is the friends we make along the way.||

Song Lyrics

https://starwars.fandom.com/wiki/Mando%27a/Legends#Songs