“You can tell the character of every man when you see how he gives and receives praise.”
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter LII: On choosing our teachers, Line 12.
Original
qualis quisque sit scies, si quemadmodum laudet, quemadmodum laudetur aspexeris.
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Seneca the Younger 225
Roman Stoic philosopher, statesman, and dramatist -4–65 BCRelated quotes

“A bore is a man who, when you ask how he is, tells you.”
The So-Called Human Race (1922), Quote from: 1001 quotations to inspire you before you die; Quintessence Editions Ltd., 2016, ISBN 978-1-84403-895-4

"World of Work" (song)
Song lyrics
Source: Gilbert O'Sullivan, "World of Work" https://www.youtube.com/watch?v=lzBK6HUpxw0 (song on YouTube)

“You can easily judge the character of a man by how he treats those who can do nothing for him.”
Source: Leaders Eat Last: Why Some Teams Pull Together and Others Don't

Book II
Rebel of the Underground (2013)

Comment made to Novalyne Price. One Who Walked Alone by Novalyne Price Ellis, pp. 78-79
Other

You Never Can Tell (1895).
Poetry quotes
Context: p>You never can tell when you do an act
Just what the result will be;
But with every deed you are sowing a seed,
Though the harvest you may not see.
Each kindly act is an acorn dropped
In God's productive soil;
You may not know, yet the tree shall grow
And shelter the brows that toil.You never can tell what your thoughts will do
In bringing you hate or love;
For thoughts are things, and their airy wings
Are swifter than carrier doves.
They follow the law of the universe —
Each thing must create its kind;
And they speed o'er the track to bring you back
Whatever went out from your mind.</p