Thankfulness first comes in the form of discovery. When you discover that someone has behaved well with you. you acknowledge that person wholeheartedly. Then everything else follows. You then learn acceptance of reality. Everything in this world is based on acceptance of reality. If you live in a certain country and have love for that country, that is a case of acknowledgement, a case of acceptance of reality. If you live in a country and don’t have love for that country, then the basis of religion is absent in you. You don’t have the basis for acceptance of reality. If you truly love your country, then you have a foundation. Acceptance of reality isn’t restricted to one thing, it would encompass many things. It won't be restricted to love for one’s country, but reach to God as well. This is about the foundation of Islam, the basis of Islam. 
The basis is acceptance of reality. This will work everywhere, be it a personal issue, a matter related to society, and even national and international issues. Everywhere, acceptance of reality is required. I believe this is the highest quality of a human being.