Even wisdom has to yield to self-interest. — Pindar

Search well and be wise, nor believe that self-willed pride will ever be better than good counsel. — Aeschylus
That which is not, shall never be; that which is, shall never cease to be. To the wise, these truths are self-evident. — William Hazlitt
Self-pity is our worst enemy and if we yield to it, we can never do anything wise in this world. — Helen Keller
Seek not, my soul, the life of the immortals; but enjoy to the full the resources that are within thy reach. — Pindar
Not every truth is the better for showing its face undisguised; and often silence is the wisest thing for a man to heed. — Pindar
Every gift which is given, even though is be small, is in reality great, if it is given with affection. — Pindar