We don't want to let changing things determine our identity.
Psalm 139:17–18 KJV 1900
17How precious also are thy thoughts unto me, O God!How great is the sum of them!18If I should count them, they are more in number than the sand:When I awake, I am still with thee.
We have to be careful we don't let feelings determine what we believe about ourselves.
Psalm 139:14 KJV 1900
14I will praise thee; for I am fearfully and wonderfully made:Marvellous are thy works;And that my soul knoweth right well.