Always be on guard, you know your weaknesses. Do not let yourself go to places that will tempt you to sin.
The way of purity is discipline through prayer and the will of correct action.
“We must be pure. I do not speak merely of the purity of the senses. We must observe great purity in our will, in our intentions, in all our actions.” - Saint Peter Julian Eymard
"Fasting disposes the heart to seek to please only God with great purity of heart." - St. Francis de Sales
"I tell you that you have less to suffer in following the cross than in serving the world and its pleasures." - St. John Vianney
"Do not be suspicious of your brother, for you will lose purity of heart." - St. John of the Cross
"I promise my special protection and the greatest graces to all those who shall recite the Rosary." - Our Lady to St. Dominic
"Let us run to Mary, and as her little children, cast ourselves into her arms with a perfect confidence." St. Francis De Sales
"Take care of your body as if you were going to live forever, and take care of your soul as if you were going to die tomorrow." - St Augustine
"Occupy your minds with good thoughts, or the enemy will fill them with bad ones. Unoccupied, they cannot be." - St. Thomas More
"Watch ye, stand fast in the faith, do manfully, and be strengthened." - 1 Corinthians 16:13