“Be ye therefore perfect, even as your Father which is in heaven is perfect.”
King James Version (KJV)
5:48 Therefore ye shall be perfect; as your Father who is in heaven is perfect - So the original runs, referring to all that holiness which is described in the foregoing verses, which our Lord in the beginning of the chapter recommends as happiness, and in the close of it as perfection. And how wise and gracious is this, to sum up, and, as it were, seal all his commandments with a promise! Even the proper promise of the Gospel! That he will put those laws in our minds, and write them in our hearts! He well knew how ready our unbelief would be to cry out, this is impossible! And therefore stakes upon it all the power, truth, and faithfulness of him to whom all things are possible.
Mt 5:48 Be ye therefore perfect. To carry out fully this great law of love would lift man to the Divine standard of perfection. This must be the aim of life. We have before us as a pattern for the perfect God; we have the Divine perfection embodied in Christ. It will require a constant struggle while in the flesh to come near so high an ideal, but it must be our continual aim. This does not teach such sanctification that we cannot sin, nor that we, here on earth, attain absolute perfection, but we have placed before us, as a model, the perfect ideal, and we will constantly ascend higher by striving to attain it.