Supple knees feed arrogance. [ Proverb ]

Wisdom sits with children round her knees. [ Wordsworth ]

The fountain of my heart dried up within me, -
With nought that loved me, and with nought to love,
I stood upon the desert earth alone.
And in that deep and utter agony,
Though then, then even most unfit to die
I fell upon my knees and prayed for death. [ Maturin ]

A yeoman upon his legs is higher than a prince upon his knees. [ Proverb ]

When the splitting wind makes flexible the knees of knotted oaks. [ William Shakespeare ]

The great are great only because we are on our knees. Let us rise! [ Prud'homme ]

Heaven's gates are not so highly arched as king's palaces; they that enter there must go upon their knees. [ Daniel Webster ]

Avoid that which an enemy tells you to do; for if you follow his advice, you will smite your knees with the hand of sorrow. If he shows you a road straight as an arrow, turn from it and go the other way. [ Saadi ]

I should have been a French atheist were it not for the recollection of the time when my departed mother used to take my little hand in hers, and make me say, on my bended knees, Our Father who art in heaven! [ John Randolph ]