In the New Testament, in the Parable of the Good Samaritan, olive oil is poured to soothe and to heal. In the anointing of kings and priests in the OT, it is again oil that is poured on the head as an image of the grace of God that comes down and flows on them (Ps 133:2) giving them new power to fulfil what is beyond human capabilities. The king is to stand on the threshold, between the will of men and the will of God, and he is called to lead his people to the fulfilment of God's will; the priest also stands on that threshold, to proclaim the will of God and to do even more: to act for God, to pronounce God's decrees and to apply God's decision.
The oil speaks first of all of the end of the wrath of God, of the peace which God offers to the people who have offended Him; further it speaks of God healing us in order that we should be able to live and become what we are called to be; and as He knows that we are not capable with our own strength of fulfilling either His will or the laws of our own created nature, He pours his grace abundantly on us (Rom 5:20). He gives us power to do what we could not otherwise do.
The words milost and pomiluy in Slavonic have the same root as those which express tenderness, endearing, and when we use the words elieson, 'have mercy on us', pomiluy, we aren not just asking God to save us from His wrath - we are asking for love.
- Metropolitan Anthony Bloom of Sourozh, Living Prayer