No one can really explain this feeling until you've lived it.
The second you walk out onto that platform and tune everything else out.
You step underneath the bar for the first time that day, and you know that all your hard work over the last few months, the last year even, have culminated in this moment of calm. You walk out, wait for the command, and know at last, it's your time to shine.
I hope everyone has a chance to experience this feeling, whether or not it be in Powerlifting. There is truly nothing like it.