Luk 10:35 And on the morrow when he departed, he took out two pence, and gave them to the host, and said unto him, Take care of him; and whatsoever thou spendest more, when I come again, I will repay thee.
It is shown here not only is the Samaritan merciful, he is also just. Today, so many "nice" Christians presume that caring is good enough. Love without wisdom, without conscience, without justice is no love at all. It is foolishness, as the etymology for the word "nice" is in Latin.
We must always be conscious of our surrounding. A good deed cannot blind the sin of carelessness.
And it is even worst if one says: ...Take care of him, and whatsoever he needs, have a heart and give to him yourself, God bless you."
The Samaritan illustrated here is obviously a trustworthy fellow as well, that he will come again and be responsible for any deficit.