I put this very simple. Right now, choose an object near you. It might be a box, a door, a tree whatever.
I'm sure there'll be always an object near you.
Look to this object. Without any intention or whatsoever.
Now answer these question(s)
Does this object exist in future? Don't just simply say no. Try to get the intuitive feeling.
Can it be exist in future? Like try to get the feeling of how solid that object is. And think of this solidness only would be exist in right now.
Throughout your thinking process, you can easily get the feeling of 5 seconds have just passed. And the object is still in it's solid form.
The ultimate thing is, nothing can exist out of boundaries of "now". or the thing. the universe. Even your thoughts can only exist in now. But it's like, try to think your thoughts as you paint the sentence on a brick wall with white color "I will be a doctor". This is the same thing. Now the painted text can only exist in the boundaries of now. This is just a thought and a sentence implies that the person has intention to become a doctor in some state-of-cosmos-universe-now. This is the same as our thoughts in mind. You just have to become aware of thoughts can exist only in now, and have no effect unless you take an action right now.
Dangerous thing is thoughts without action taken can be dangerous. Because your mind is very manipulative about this. You can tie a lot to thoughts and believe them. I.e lets continue on "I'll be a doctor" example. If you don't just take an action towards that It will linger in your mind and It has potential to become something such: this is so stressful, all the years that I have to study and bla bla... You see?
