Melting hearts, in Scripture, are consistently associated with discouragement and fear. Note a few examples:
βAnd he also that is valiant, whose heart is as the heart of a lion, shall utterly meltβ¦β (II Sam. 17:10).
βTherefore shall all hands be faint, and every manβs heart shall meltβ (Isa. 13:7).
βThe heart melteth and the knees smite togetherβ¦β (Nah. 2:10).
Christians, therefore, should not pray for melted hearts, as so many do. There are too many believers with melting hearts now! Indeed, men of God, down through the ages, have always found it a real task to keep the hearts of Christians from melting. Fear can easily become cowardice and cowardice, like courage, is extremely contagious. For this reason God explicitly instructed the military officers of Israel to announce to their armies:
βWhat man is there that is fearful and faint-hearted? let him go and return unto his house, lest his brethrenβs heart faint as well as his heartβ (Deut. 20:8).
If ever Godβs people needed confidence and courage it is in the day of crisis β especially spiritual crisis β in which we live. Here Paulβs word to the Ephesian believers is appropriate:
βFor we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against [wicked spirits] in high placesβ (Eph. 6:12).
Thank God! While the opposition of our adversary during βthis present evil ageβ calls for special courage and steadfastness of heart, God has made particular provision for us, for He has given us more light on His Word than was given those of former ages and we can meet the enemy with βthe whole armor of God.β Moreover we have Godβs Word through Paul, that battle-scarred warrior:
βGod hath not given us the spirit of fear, but of power, and of love, and of a sound mind. Be not thou therefore ashamed of the testimony of our Lord, nor of me, His prisoner: but be thou partaker of the afflictions of the gospel according to the power of Godβ (II Tim. 1:7,8). source