emptiness...

If there is nothing with own nature there can be nothing with other nature, something which is dependent for its existence and nature on something else which has own nature. Furthermore, if there is neither own-nature nor other-nature, there cannot be anything with a true, substantially existent nature. If there is no true existent there cannot be no non-existent (true existent has gone out of existent). Nothing will prevail for those in whom emptiness will not prevail, while everything will prevail for whom emptiness prevails.

Therefore all dharmas (One of the basic, minute elements from which all things are made) are like a dream or magical illusion. There is something there in experience, and one can describe it well in terms of dharmas, so it is wrong to deny these exist; yet they don’t have substantial existence either.
(Nagarjuna)

A God becomes a Man, Jesus…
A Man becomes a God, Gautama…
(If there is nothing with own nature there can be nothing with other nature)

four holy truths

Suffering is inherent in life.
Suffering and repeated lives are caused by craving.
Craving thus suffering can be destroyed.
Eightfold Path is the course leading to these.

Eightfold path is the way to achieve nirvana, these are

Right understanding,
Right thought,
Right speech,
Right action,
Right livelihood,
Right effort,
Right mindfulness, and
Right concentration.

(Buddhism)