seize the day
To enjoy the present and not worry about the future; to live for the moment.
verb
To deliberately take hold of; to grab or capture.
To take advantage of (an opportunity or circumstance).
To take possession of (by force, law etc.).
to seize smuggled goods
to seize a ship after libeling
To have a sudden and powerful effect upon.
a panic seized the crowd
a fever seized him
Alternative spelling of seise (“to vest ownership of an estate in land”).