A courageous soul resurrects his dying mind

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 13 ~ On Despondency

¶9. Each of the other passions is destroyed by some particular virtue. But despondency for the monk is a general death.
¶10. A courageous soul resurrects his dying mind, but despondency and sloth squander all his riches.

Do not give up, but stand your ground courageously

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 5 ~ On Repentance

¶30. Do not be surprised that you fall every day; do not give up, but stand your ground courageously. And assuredly, the angel who guards you will honour your patience. While a wound is still fresh and warm, it is easy to heal; but old, neglected and festering ones are hard to cure, and require for their care much treatment, cutting, plastering and cauterization. Many from long neglect become incurable, but with God all things are possible.

Take up arms courageously

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 1 ~ On Renunciation of the World

¶22. Let us charge into the good fight with joy and love without being afraid of our enemies. Though unseen themselves, they can look at the face of our soul, and if they see it altered by fear, they take up arms against us all the more fiercely. For the cunning creatures have observed that we are scared. So let us take up arms against them courageously. No one will fight with a resolute fighter.