This is true.
There are also Scriptural events that help us to understand the importance of helping one another with prayer and/or helping another person by our intercessory actions.
Just a few examples among quite a few:
Those who helped to hold up the arms of Moses as he prayed to God;
Those who made an opening in the roof and lowered the man into the area where Jesus was, so that Jesus could cure him;
The foot soldier that the centurion sent to Jesus to ask Him to cure his child.
Then there was Mary who was sent by the angel to help her cousin Elizabeth—who saw Mary and in that moment recognized Mary as blessed and the fruit of her womb as blessed.
At Cana, it was God’s will that Mary intercede for the poor couple who ran out of wine at their wedding feast. Since Scripture tells us in the Psalms that whatever God wills, He does, we can be sure that it was His will that Mary should act as intercessor. All she said was: “They have no wine”. Jesus did the rest. She also told the chief steward: “Do whatever He tells you”. The chief steward listened to her, did what the Lord told him to do, and —not surprisingly at all—he was, by listening and obeying, the first person to witness Jesus’ first public miracle.
I believe that is the best advice ever given to anyone by any human person.
Some of the comments on this thread, even before I went to bed last night, reminded me of an occasion when Larry Lewis spoke to the RCIA class at our parish. My husband and I, who are also both converts, were sponsors in that class.
One of the candidates, a mature man, maybe in his late 40’s, asked Larry about opposition from one’s family, and what could be done. Larry said that it hurt him and Joetta every day to know that their children felt such hostility toward the Catholic Church, and such resentment at the path their parents’ journey had taken. All he could do was suffer it, like Jesus suffered and Mary suffered.