I believe you mean the lenient not serious messages that give a good feeling. Some verses that teach and give us rules on how to defend ourselves for example are not lenient but serious and give us a really intense feeling yet I believe they are positive!
Here goes:
1- Chapter 60, verse 8:
God does not forbid you from those who do not fight you because of religion and do not expel you from your homes - from being righteous toward them and acting justly toward them. Indeed, God loves those who act justly. This covers all people no matter what their beliefs are.
2- Chapter 29, verse 46:
And do not argue with the People of the Scripture (people of the book, the Christians and Jews) except with the best of manners, except for those who commit injustice among them (something universal that applies also to Muslims), and say, "We believe in that which has been revealed to us and revealed to you. And our God and your God is one; and we all submit to Him. This is about peace specifically with Christians and Jews.
3- Chapter 17, verses 23&24 in peace with parents:
And your Lord has decreed that you not worship except Him, and to treat your parents with kindness. Whether one or both of them reach old age [while] with you, say not to them "uff" (or similar, a nagging sound) and do not repel them but speak to them kindly. And lower to them the wing of humility out of mercy and say, "My Lord, have mercy upon them as they brought me up [when I was] little.
4- Chapter 16, verse 90:
God orders justice and good conduct and giving to relatives and forbids immorality and bad conduct and oppression. He admonishes you that perhaps you will be reminded.
5- Chapter 24, Verses 27 and 28:
O you who have believed, do not enter houses other than your own houses until you ascertain welcome and greet their inhabitants. That is best for you; thus you are reminded.
And if you do not find anyone therein, do not enter them until permission has been given you. And if it is said to you, "Go back," then go back; it is purer for you. God is Knowing of what you do.
6- Chapter 16, Verse 91:
And fulfill the covenant of God when you have taken it, and do not break oaths after their confirmation while you have made God , over you, a witness. God knows what you do.
7- Chapter 16, Verse 125:
Invite to the way of your Lord with wisdom and good instruction, and argue with them in a way that is good. Your Lord is most knowing of who has strayed from His way, and He is most knowing of who is [rightly] guided.
8- Chapter 16, Verse 126:
And if you punish [an enemy, O believers], punish with an equivalent of that with which you were harmed. But if you are patient - it is better for those who are patient (which is a recommendation to forgive).
Actually, the Quraan is full of such verses, but some people prefer to destructively criticize on first priority for some reason. I chose to not beef up this post so it is easier and more appealing to the reader!
Peace and love to all