It takes patience to do things properly and patience is required in the waiting for something good to grow. It's like gardening. It takes time for a tiny seedling to grow and show it's first shoots and like that it takes time to cultivate a habit and behaviour.
So it is for a relationship with a child(old or young) and developing his habits - it does not just take lots of love and care but PATIENCE too.
“Patience is waiting. Not passively waiting. That is laziness. But to keep going when the going is hard and slow - that is patience.” And you need perseverence too. Hard to practise in this fast moving world, when we have so little time.
To grow and refill patience, be present in the here and now, or as May Sarton suggests consider gardening - “Everything that slows us down and forces patience, everything that sets us back into the slow circles of nature, is a help. Gardening is an instrument of grace.”
Sometimes less is more.