This number is quite unique!
Today the angels are sending you this message: simplify, simplify. The number 4 denotes spiritual strength, and 21 is a blending of duality and singularity.
Simply stated, the angels want you to slow down a bit and see what you might be missing.
You’re so focused on one of the realms that you’re neglecting the other.
Strive to put those two pursuits back into balance. You are not one with yourself today. Take a few moments, take a deep breath, and begin again.