Now a leper came to Him, imploring Him, kneeling down to Him and saying to Him, “If You are willing, You can make me clean.” Then Jesus, moved with compassion, stretched out His hand and touched him, and said to him, “I am willing; be cleansed.” As soon as He had spoken, immediately the leprosy left him, and he was cleansed. And He strictly warned him and sent him away at once, and said to him, “See that you say nothing to anyone; but go your way, show yourself to the priest, and offer for your cleansing those things which Moses commanded, as a testimony to them.” (Mk1:41-44NKJV)
The fearsome Augustine had once insisted that charity should be exercised “in serenity” rather than an emotional empathy. Those who were moved by compassion to help others he believed lacked wisdom. He concluded on the matter: “There is no harm in the word ‘compassionate’ providing there is no passion in the case” [A]. Such stoicism is surely misplaced: it is noble enough for an individual to endure misery without complaint but any who remain unmoved by another’s pain or distress show themselves to be inhumane and spiritually dead. Jesus Christ provided the pattern for genuine stoicism: silent resilience in the face of personal suffering and abuse; yet filled with heartfelt (literally bowel-felt) compassion (Greek: splagchnistheis) towards others who were in need, as with the leper in the quoted passage.
Neither is Jesus merely reflecting “the human face of God”: YHWE’s character even as it is revealed in the Old Testament exhibits both passion and compassion; the Father’s nature that we are to emulate (Eph5:1) is thoroughly animated in the face of human wickedness, cruelty, injustice, lies and hypocrisy: He does not exhibit a placid, deistic indifference to these matters but is filled with righteous anger, as was often expressed through His prophets (e.g. Jer6:11). Yet equally He is compassionate towards those who fear Him and who suffer through the wickedness of others, and has promised to punish the latter firmly and proportionately, recompensing the offended at the expense of the offender (cf. Is59:18KJV). Those who are pained by the suffering of others, far from “lacking wisdom” show themselves to be truly human by reflecting the definitive quality of the divine, being Agape (1Jn4:7,8).
[A] Augustine – “On the morals of the Catholic Church” chap. 27 (para 53)