The omnipotent and omniscient God is with all who trust in Him. He is patient in guiding and wise in direction. He loves us with a perfect love. He is for us and with us. He is on our side if we have trusted in His Son. Granted He disciplines us and sometimes severely so. But His ultimate goal is His glory and our good. He will perfect that which He has begun. It is comforting to know that in spite of some very hard circumstances He has the whole world in His hands as the song says.
Gill's commentary declares:
God is able to do it, and none can hinder him; he has promised to do it, and he is faithful who will do it; and his glory is concerned in it; and it may be depended on it will be finished; he is a rock, and his work is perfect.Matthew Henry states:
"Whatever good there is in us, it is God works in us both to will and to do. The Lord will perfect the salvation of every true believer, and he will never forsake those whom he has created anew in Christ Jesus unto good works."