Life, the so-called material life, has a meaning of its own. Living itself is all that is there. Your search for spiritual meaning has made a problem out of living. You have been fed all this rubbish about the ideal, perfect, peaceful, purposeful way of life, and you devote your energies to thinking about that rather than living fully. In any case you are living, no matter what you are thinking about.
Life has to go on.
You are living. There is nothing to be achieved, nothing to accomplish. You have invented selflessness as an object to pursue, meanwhile continuing to be selfish. A certain amount of practical selfishness is necessary for survival, of course, but with you it has become a tremendous, unsolvable problem. Here there is no need to sit in special postures and control your breath.