A "new" wineskin can receive fresh wine and stretch and mature with it. An "old" wineskin will break when new wine is poured into it and starts stretching and maturing. Why? Because it lacks the trust that believes the stretching is for its good. When the Lord starts to give a fresh revelation of who he is, and who we are, it will reveal if we carry the trust to allow that revelation to mature IN us, or if we are so stuck on what is comfortable that it will break us and waste the wine. Stretching is a blessing.