Meaning
The problem with relying on our own strength to live the Christian life is that we are weak, limited, , finite (having limit) , fragile and sinful. Also, whatever strength we have can be taken from us at any given moment and we can also easily be led astray. (away from him), but rather let us trust Him because he has never failed and will never fail. He is ever faithful; he keeps promises. 
God will remain true to his words, and he will keep them under whatever circumstance so that all people can glorify his name. let us declare the wonderful works of Him, Who has saved us by grace through faith in Christ; adopted us into His own family and covered us in Christ's royal robe of righteousness.