Why do we continue to stumble despite all of God’s teachings?

We continue to stumble because we fail to walk uprightly, we fail to meditate daily on God’s word so that we could understand His precepts, that we may know His ways and walk in them. “If you do what is right, will you not be accepted? But if you do not do what is right, sin is crouching at your door; it desires to have you, but you must rule over it. Therefore, do not let sin reign in your mortal body so that you obey its evil desires.” If you allow this, you will be sinning against the Lord; and you may be sure that your sin will find you out and you will continue to stumble. Who is wise? Let him understand these things.