But love your enemies, do good to them, and lend to them without expecting to get anything back. Then your reward will be great, and you will be children of the Most High, because he is kind to the ungrateful and wicked. Be merciful, just as your Father is merciful.
Luke 6.35-36, TNIV
Impossible to do that not only in Jesus' time, but also in our time. But then...
But those who hear my words and do not put them into practice are like a man who built a house on the ground without a foundation. The moment the torrent struck that house, it collapsed and its destruction was complete.
So, it is not whether such tasks are possible, it is a commandment. And since it is a commandment, it is done for. No question asked. Why not? Because it was commanded by someone who claimed and proved himself to be the creator of heaven and earth. No negotiation.
In the sphere of salvation, the living out of faith, thought, and discipleship takes the form of a visible, tangible, practical, bodily mode of existence; a disposition, habit, and action. It is this, or it is nothing at all.Anthony Thiselton, Hermeneutics of Doctrine, p.47 (emphasis his, coloured mine)