What do you think this means?
I suppose it could mean several things, but for me, it’s clear:

Don’t let the critics get you down.

There will be naysayers at every step of your journey … people who think you’ve taken the wrong turn … made the wrong decision … chosen the wrong alternative.
You can pause … you can listen … but you’ve got to pick your battles. Every plan has its flaws … every road has its potholes … but if you stop to consider every objection or resistance to your plan, you won’t get very far.
Let the dogs bark.
You? Keep on keeping on!