Proverbs 21:3 To do righteousness and justice is more acceptable to the Lord than sacrifice.
Most religions and even organisation have a moral code by which they say they live; those moral codes are important to them.
Just the same, we have a code by which we should live as Christians showing love, mercy, justice and truth to others.
If we want to be effective Christians we need to show others we do live by that code and we stick to it.
When done with the right spirit obeying these ways are much more important to God than sacrifices we make.