Peace, the Road to Perfection
Experience shows us that peace, which sows charity, the love of God and love of neighbor in your soul, is the road that leads straight to eternal life.
Take care to never let your heart be troubled, saddened, agitated or involved in that which can cause it to lose its peace. Rather work always to remain tranquil because the Lord says: "Happy are those who are at peace." Do this and the Lord will build in your soul the City of Peace and He will make of you a House of Delight. That which He wants of you is that, whenever you are troubled, you would recover your calm, your peace, on your own - in your work, in your thoughts and in all your activities without exception.
Just as a city is not built in a day, do not think that you can achieve, in a day, this peace, this interior calm, because it is within you that a home must be built for God, while you yourself, become His temple. And it is the Lord Himself Who must handle the construction. Without Him your work would not exist.
Remind yourself, moreover, that this edifice has humility for its foundation.
Juan De Bonilla (Spanish Franciscan of the 16th Century who wrote a little treatise on peace of soul.)