“He that shall persevere to the end, he shall be saved.” St. Jerome

What toil we must endure, what fatigue, while we are attempting to climb hills and the summits of mountains! What, that we may ascend to heaven! If you consider the promised reward, what you endure is less. Immortality is given to the one who perseveres; everlasting life is offered; the Lord promises His Kingdom. – St. Cyprian of Carthage

The principal act of courage is to endure and withstand dangers doggedly rather than to attack them. – St. Thomas Aquinas

Vigils, prayer and patient acceptance of what comes constitute a breaking that does not harm but benefits the heart, provided we do not destroy the balance between them through excess. He who perseveres in them will be helped in other ways as well; but he who is slack and negligent will suffer intolerably on leaving this life – St. Mark the Ascetic

Grant me, O Lord my God, a mind to know you, a heart to seek you, wisdom to find you, conduct pleasing to you, faithful perseverance in waiting for you, and a hope of finally embracing you. Amen. – St. Thomas Aquinas

Though the path is plain and smooth for men of good will, he who walks it will not travel far, and will do so only with difficulty, if he does not have good feet: that is, courage and a persevering spirit. – St. John of the Cross

You think it very hard to lead a life of such restraint unless you keep your eye of faith always open. Perseverance is a great grace. To go on gaining and advancing every day, we must be resolute, and bear and suffer as our blessed forerunners did. Which of them gained heaven without a struggle? – St. Elizabeth Ann Seton

By the intercession of St. Michael and the celestial Choir of Archangels may the Lord give us perseverance in faith and in all good works in order that we may attain the glory of Heaven. Amen. – taken from the Chaplet of St. Michael

Nothing great is ever achieved without much enduring. – St. Catherine of Siena

So blessed are you if you persevere in doing good, neither seeking nor desiring any consolation, for as St. Bernard says: To serve God is nothing else than to do good and suffer evil, and the rule of the true servant of Christ is never to receive consolation except in time of great necessity. This is the secure way; for whoever wants to go to God through sweetness and consolation is deceived. – St. Catherine of Bologna