Energy or effort (viriya) is the root of all
achievements. It is of three kinds:
the element of putting forth effort or initial
attack;
the element of stepped-up effort or exertion;
the element of striving towards success
Just as you weaken and prevent the weeds and insects
from attacking the plantation, so also for every
second you put in energy, you will be able to remove
the defilements away from you and weaken the
hindrances.
extract from: On the Path to Freedom
by Sayadaw U Pandita
upekkha - equanimity i.e. even-mindedness based on
insight into the nature of things