If you think your son has a vocation to priesthood, don’t push him.
Gently invite and then it is best to leave it alone. If God is calling, your son will hear that call and, with your encouragement and support, will respond. Try to provide opportunities for your son to hear God’s call. This starts, first and foremost, with attendance at Mass as a family every week. Also, daily prayer as a family will help create the environment where a vocation can be nurtured. Pray before you eat dinner together. Ask each child to say where he or she saw God today. That will help them to be more attentive to God’s work in the world and in their lives. Pray the Rosary as a family together. Go on a pilgrimage as a family. Volunteer as a family.