We could've so many relatives like 
brothers, sisters, sons, daughters, 
mother-in-laws, father-in-laws, 
son-in-laws, daughter-in-laws, 
grand sons & grand daughters, etc, etc.

We could even have so many life partners.

We may have so many friends.

We are having so many neighbors.

We are having so many rulers and leaders.

There may be either good or bad 
relationships.

There may be some difference of opinions, conflicts, disputes, controversies.

Also, our relationships with our mother 
might have been like it. 

But everyone of us 
must have only one mother!

Let us love her!

Likewise, we are having only one Earth!

Let us love everything on this Earth!

We are all, 
the children of one mother 
and children of 
one Mother Earth!

Let us love each other!!!