'Reason' in the Bible

Immediately Jesus, being fully aware [of their hostility] and knowing in His spirit that they were thinking this, said to them, “Why are you debating and arguing about these things in your hearts?

For this reason a man shall leave his father and his mother [to establish a home with his wife],

For this reason I am telling you, whatever things you ask for in prayer [in accordance with God’s will], believe [with confident trust] that you have received them, and they will be given to you.