Let the shoemaker stick to his last, the peasant to his plough, and let the prince understand how to rule. Goethe.
Let the thing we do be what it will, it is the principle upon which we do it that must recommend it. Thomas à Kempis.
Let the tow (rope) gang wi' the bucket. Sc. Pr.
Let the world slide, let the world go; / A fig for care, and a fig for woe! / If I can't pay, why, I can owe, / And death makes equal the high and low. Heywood.
Let the world wag. Pr.
Let the young people mind what the old people 5 say, / And where there is danger keep out of the way. Pr.
Let them call it mischief; / When it is past and prosper'd it will be virtue. Ben Jonson.
Let them obey that know not how to rule. 2 Hen. VI., v. 1.
Let there be thistles, there are grapes; / If old things, there are new; / Ten thousand broken lights and shapes, / Yet glimpses of the true. Tennyson.
Let thine eyes look right on. Bible.