Yes, I agree. It does make a difference to take part in a prolife demonstration like this.
Those who participate in the demonstration today may do so with the certain knowledge that there are countless "witnesses," (seen and unseen) to their act of faith and duty to the Creator of all.
Hebrews 12:1 - King James Bible (Cambridge Ed.)
" Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us. . . ."