Dream is the first step to achieve something in life. So I guess a life without dreams would be like being a boat wandering at unknown speed, with no destination just idle in the middle of nowhere.

There are 2 possible answers here, I am not sure what you mean. 1.If you had a dreamless life how would you live? This means what would you do if you didn't dream at night. My answer is that it would not worry me. 2. If you didn't have a dream in your life how would you live? My answer is that If I didn't have a dream/goal to attain, my life would seem unfulfilled.

my dream is like a mountain , I have to climb it until I reach the top of it !!