A big organization, by definition, must ask its people to put their own individuality aside and work as a group. There is little room for some of the aspects of your life that are most central to you, be they religious beliefs or cultural traditions.
The ability to put these things aside at the workplace is an asset to your organization because your beliefs and traditions no doubt would conflict with those of others, until nothing could be accomplished other than arguing over decorations and the relative superiority of ethnic foods.
Nevertheless, putting these things aside in the workplace does not mean putting them aside in your life. To feel we have succeeded in life, we cannot conclude we have given up the things that really matter to us. Otherwise, what have we really accomplished?
Those who express satisfaction with their accomplishments know that they can never toss aside the beliefs, customs, and values that they hold dear. They just display them on their own time.