This is a pretty good, short description of spiritual practice! Just keep gathering everything together into one. A lot of what else is said about spiritual practice is actually aimed at overcoming hangups, habits, and fixed ways of viewing things that get stuck stuck on.
But when it comes down to it, gather everything into one. Keep doing that, and everything else will become clear as you do that, and afterwards.
They gathered together everything under heaven into one,
until one day it burst forth,
and they realized its interconnected essence.
천하가 합하여 우뚝 솟아 공을 이루니,
Wake Up and Laugh! 