If thou think wholly upon thyself and upon God, what thou seest out of doors shall move thee little. - Thomas à Kempis

Seek a suitable time for thy meditation, and think frequently of the mercies of God to thee.

My Son, beware thou dispute not of high matters and of the hidden judgments of God; why this man is thus left, and that man is taken into so great favour; why also this man is so greatly afflicted, and that so highly exalted. These things pass all man’s power of judging, neither may any reasoning or disputation have power to search out the divine judgments. When therefore the enemy suggesteth these things to thee, or when any curious people ask such questions, answer with that word of the Prophet, Just art Thou, O Lord, and true is Thy judgment, and with this, The judgments of the Lord are true, and righteous altogether. My judgments are to be feared, not to be disputed on, because they are incomprehensible to human understanding.

Simplicity and purity are the two wings by which a man is lifted above all earthly things. Simplicity is in the intention; purity in the affection. Simplicity tends to God; purity apprehends and tastes Him.