Saints spring and thrive most ...

Saints spring and thrive most internally, when they are most externally afflicted. Afflictions are the mother of virtue.
 Thomas Brooks

Quotes from the same author

Ambition is a gilded misery, a secret poison, a hidden plague, the engineer of deceit, the mother of hypocrisy, the parent of envy, the original of vices, the moth of holiness, the blinder of hearts, turning medicines into maladies, and remedies into diseases.
 Thomas Brooks
When you have overcome one temptation, you must be ready to enter the lists with another. As distrust, in some sense, is the mother of safety, so security is the gate of danger.
 Thomas Brooks
It is not the bee's touching of the flower that gathers honey, but her abiding for a time upon the flower that draws out the sweet. It is not he that reads most, but he that meditates most, that will prove the choicest, sweetest, wisest and strongest Christian.
 Thomas Brooks
Every thing that a man leans upon but God, will be a dart that will certainly pierce his heart through and through. He who leans only upon Christ, lives the highest, choicest, safest, and sweetest life.
 Thomas Brooks
God's hearing of our prayers doth not depend upon sanctification, but upon Christ's intercession; not upon what we are in ourselves, but what' we are in the Lord Jesus; both our persons and our prayers are acceptable in the beloved [Eph 1.6].
 Thomas Brooks