A loving father's will for his children is always for their best. I think that statement is pretty easily acceptable. I know there are dads and for that matter moms out there who can become self absorbed and therefore neglect the best for their kids but by and large loving parents desire the best for their children. I know that when I think about my three boys I want nothing but good for them. It's in the truth of this statement that we can find our greatest strength to yield our will and embrace God's.
See, God is the great heavenly father. His love for His children is perfect and he only wants what will work out for our good. This is at the heart of Christ's declaration in Luke 11:
11What father among you, if his son asks for a fish, will instead of a fish give him a serpent; 12or if he asks for an egg, will give him a scorpion? 13If you then, who are evil, know how to give good gifts to your children, how much more will the heavenly Father give the Holy Spirit to those who ask him!"
God is revealing the perfect love motivation of the Father towards His children, and in this, gives us the confidence to trust His guidance and gifts in our lives. Now this doesn't mean that His will will always appear to us to be "what's best" (kinda how my kids don't always think when we make them go to bed early is for their best) but He knows so much better for us then we ever will. Since He is our good, heavenly Father we can let go of our will and and rest in His. Sometimes that means hard times and struggles but in the end we know His heart of grace towards us will produce a life of grace that brings glory to God. FB Meyer beautifully expresses this reality:
MANY PEOPLE shrink from God's will. They think that it always means pain, or sorrow, or bereavement. They always feel melancholy when you speak of doing the Will of God. Alas! how the devil has libeled God. The will of God is the will of a Father. It is the Fatherhood of God going out in action.
When we yield our will to our loving Father's we will begin to mature into our highest purpose.