John 10:9 (NKJV)
9 I am the door. If anyone enters by Me, he will be saved, and will go in and out and find pasture.
No picture is better for us to understand perseverance in life than the Gospel of Jesus Christ and God’s plan of Salvation. We will go through many doors in our lives, some of them we open, some God provides and some change from closed to opened for us to fulfill our purpose in Life. Sin can cause us to take a wrong door that we created on our own and when God closes it to help us back on track with another open door we miss it by pouting and looking at the closed door with regret that we did not get what we wanted. Jesus tells us if we use him as our first door before entering others that we can go in and out of other doors and he will go with us and guide us.