言うは易し、行うは難し。の英語

Easier said than done.

Easier said than done.

To say is easy, but to do is difficult.

It's easier said than done.

That looks easy but it's actually difficult.

It's very easy to use.

It's simplicity itself.

It is well said that “it is easy to injure, but hard to cure.”

It is not easy to skillfully carry out easy tasks.

a drawback or difficulty that is not readily evident

It's easy to say, hard to do.

This one is a lot easier.

with facility

I don't think it's that simple.

There is nothing to it.

Once I tried tackling the question, I realised it was easy.

I found the problem was easy.

This question is really easy, isn't it?

It's not easy for me.

That will simplify matters.

It probably won't be easy to do that.

It's simple and easy to understand.

What an easy problem it is!

It's simple and intuitive.

It is more difficult to maintain than to initiate

It is easy to set things a going, but hard to keep them going.

a matter that seems simple but is actually important

It's not easy.

It is really easy.

That is very simple.

Easier said than done.

It's easier said than done.

It is easier said than done.

I know this is difficult.

That is extremely hard.

The hardest thing is to keep silent.

extreme difficulty

Nothing is as difficult as explaining something difficult in a simple manner.

the state of appearing to be complicated

I heard that's difficult.

That isn't very hard to do.

I heard that's difficult.

There nothing so difficult but it becomes easy by practice.

I also feel the difficulty of that.

the act of stating something in a brief and simple manner

the quality of being easy to do

That will gradually become more difficult.

of something, seeming simple to do

to make something short and simple

That seems simple, but it's surprisingly difficult.

the degree of ease in doing things

It keeps getting harder and harder.

It isn't hard to do.

of things, being easy to do

That was very difficult.

But this was easier [sooner] said than done.

a thing that is hard to obtain

It is growing more difficult.

of something, the state of being simple and easy to understand

Just like you said, that would be difficult.