Doubtless much that passes for prayer is a routine and meaningless exercise dictated by custom. (religion-online.org)
Isn't correlating against something that constitutes only 2.5 % of the heating when one is looking for the source of the heating a rather meaningless exercise? (climatesciencewatch.org)
David's talking about feeling the need to go to church as habit — a meaningless exercise we still do because it's ingrained. (nakedpastor.com)