Romans 14:18

‘For he who in this serves Christ is well-pleasing to God, and approved of men.'

So the one who serves Christ in this way, by having a regard for the tender consciences of others, is well pleasing to God. And he is also approved of by men because he does not persuade people to act against their consciences.

Some see ‘in this' as referring back to the righteousness, peace and joy which result from being under the Kingly Rule of God, indicating that this is what pleases God. But while that thought may be true, it would be to ignore the context, which continues to emphasise the need for us to be concerned about each other.