Any advice about love and relationships from married couples?

I was watching this couple on TV who have been married for 25 years - they were dating for 4 years before they were married. They were giving a younger couple advice about it and some of things they said touched me:- the husband said in order to love someone, you have to love yourself and you have to LOVE and accept the partner's"negative/weak"qualities FIRST before loving the"positive/strengths"so then you will love the person more. He said girls will be moody sometimes and he learned to love and accept it and vice versa- Always stay positive, never give up on yourself and on your partner - DON'T LISTEN TO WHAT OTHERS HAVE TO SAY ABOUT YOU TWO"who cares?"- even when there are problems, (financially, situational, etc...) always stay strong and say,"it's okay, everything's going to be okay.."WHAT DO YOU THINK? TRUE? CAN YOU GUYS ADD MORE? I APPRECIATE ALL THE WISDOM