Sacrifices in life give you peace in your mind

Peace of mind not easy in today's life but I think its very easy to live with peace of mind by accepting and practicing the word " Sacrifice "

Sacrifice means to give up for others and win the confidence and love, in other words balancing of you mind and heart for other happiness.
Once you practicing the sacrifice in day to day life, you feel inner peace of mind, means you feel happiness and love. In other words I can say, you are one step near to GOD( Spiritual life ) because you are accepting things happening in you life. You are then enjoying every moment of life.

Big question come out what is the meaning of sacrifice ?
According to me sacrifice definition can not be define in word because its change its meaning individual to individual from child to an older man.

What you think?Your valuable suggestions/feedback are welcome.