Imitation of Christ

Qui tempore pacis nimis securus esse voluerit, sæpe tempore belli nimis dejectus et formidolosus reperietur. Si scires semper humilis et modicus in te permanere necnon spiritum tuum bene moderare et regere, non incideres tam cito in periculum et offensam.

He who in time of peace wills to be oversecure shall be often found in time of war overdispirited and full of fears. If you knew always how to continue humble and moderate in yourself, and to guide and rule your own spirit well, you wouldest not so quickly fall into danger and mischief.

Imitation of Christ, III, 7:4