Charles H. Spurgeon on Psalms 1:6

"For the Lord knoweth the way of the righteous: but the way of the ungodly shall perish." Behold how David here terrifies us away from all prosperous appearances, and commends to us various temptations and adversities. For this "way" of the righteous all men utterly reprobate; thinking also, that God knoweth nothing about any such way. But this is the wisdom of the cross. Therefore, it is God alone that knoweth the way of the righteous, so hidden is it to the righteous themselves. For his right hand leads them on in a wonderful manner, seeing that it is a way, not of sense, nor of reason, but of faith only; even of that faith that sees in darkness, and beholds things that are invisible. Martin Luther.