On the part of: this word has its normal dictionary meaning of “lack of success,” On the part of: This can be replaced

• with the word “by,” which has the same meaning, Loved ones: usually
• means family and/or close friends, To act: means “to act something or do something about it.”
• So

you could write this phrase as follows and keep the same meaning: Failure

by friends and family to do something.

What is the need for a change of heart?