Francis of Assisi

Francis of Assisi was a fellow who lived in Italy in the 13th century. He is most known for his love for animals and for forming the Christian order 'The Friars Minor.'
Francis was the son of a fairly well-off clothing merchant. In his youth, he partied a lot and was very frivolous in his lifestyle.
However once he was touched by God he completely gave up his old self, and gave all he had to beggars. He even touched lepers. Francis' prayer was "Great and glorious God, and Thou, Lord Jesus, I pray Ye, shed abroad Thy light in the darkness of my mind... Be found of me, Lord, so that in all things I may act in accordance with Thy Holy Will."
In his life, he prayed many more times, but this was in fact the whole mission of his life- to do God's will.
Francis is now known as Saint Francis of Assisi, patron saint of animals, birds, and the environment.
It is true, any person can become a saint as long as one is submitted fully to God.