In the Name of Allah, The Most Gracious, Ever Merciful.
Love for All, Hatred for None.
That is why a true believer is he who does his duty towards God and also does his duty towards his fellow beings - and he does so with great care. It is only the people who perform these two kinds of duties that can be said to be acting upon all the teachings of the Holy Quran, otherwise it will be said that he is acting upon the teachings of half of the Holy Quran.
But it must be remembered that it does not lie in the power of man to act on both the aspects of his duties of his own will and power. Man is tied down with the chain of low passions of the self. Unless he is vouchsafed the grace of God and unless God enables him to do these things, he cannot do anything whatsoever. That being the case one should always continue supplicating to God that He may enable him to do good and grant him riddance from the low passions of self. The self (which is prone to low passions) is a great enemy of man. Had it not existed, the Satan also would not have been there. It is an enemy that works inwardly and it can be aptly described as a snake under the grass. As for the Satan, it is an outward enemy.
It is a common knowledge that when someone wishes to break into somebody's house, he has to have some inmate of the house to be his friend and informant. The thief who has to come from without cannot act unless he has somebody from within with whom he has made a secret plan. That is why the Satan works from without and the self works from within and that is how the faith of the man is robbed and the light of belief is extinguished. God says in the Holy Quran ..... that is to say, I do not take myself to be free (it is Joseph who is made to say this). Verily the self which is guided by low passions carries the man towards evil.