There is no man who will not be grieved at the time of his chastisement; and there is not man who will not endure a bitter time, when he must drink the poison of temptations. Without them, it is not possible to obtain a strong will. When he has often experienced the help of God in temptations, a man also obtains strong faith.
Isaac of NinevehIn all things that you find in the Holy Scriptures, seek out the purpose of the words, that you may enter into the depth of the thoughts of the saints and understand them with greater exactness. Do not approach the reading of the Divine Scriptures without prayer and asking the help of God. Consider prayer to be the key to the true understanding of that which is said in the Holy Scriptures.
Isaac of NinevehThe wisdom of the Holy Spirit is much greater than the wisdom of the entire world. Within the wisdom of the Holy Spirit, silence prevails; the wisdom of the world, however, goes astray into idle talk.
Isaac of NinevehLet there always be a preponderance of mercy with you, even though you don't feel such mercy in yourself, as God has for the world ... A cruel and merciless heart is never purified. A merciful man is the doctor of his own soul, because as it were a by a strong wind from is heart he drives out the darkness of the passions.
Isaac of NinevehThe Lord bears all the weaknesses of men, but He does not bear a man who is always murmuring, and does not leave Him without chastisement.
Isaac of Nineveh