Behold, how good and how pleasant it is for brethren to dwell together in unity! It is like the precious ointment upon the head, that ran down upon the beard, even Aaron's beard: that went down to the skirts of his garments; Psalms 133:1-2
We, as a people, can be very rebellious and headstrong. What an act of love our Heavenly Father has bestowed upon us to mature us.
The ointment on Aaron's head represents the anointing of God's Holy Spirit. It is pictured as flowing into his beard. Children can't grow beards, only those who are mature.
Heavenly Father, You love us so much! You are maturing us into an awesome body of believers, without strife or contention, so that we may be of one mind and one accord. It truly is good and pleasant when the brethren dwell together in unity.