The evil inclination draws its power from the left column and when the left column is stronger than the right then the person is also considered evil because he falls into the control of the evil side.
A righteous knows to keep the covenant, which is the central column in order to control the left side by restricting the light that comes from the left.
With the Morning Prayer he activates the sword (the tongue) with the Holy name and able to cut out the evil. This is the secret of the verse “If someone comes to kill you, be first to kill him”.
Before you let the evil to have a hold in you, connect to the holy names with your prayers to remove all evil from having any control over you.
Everyday is new and in the cycle of life and a connection must be renewed. Keep your tongue (sword) pure to protect the inner light. This sword has double edge and can be easily turned to hurt the person that uses it negatively.
For a similar reason, to keep your health in balance, wake up before sunrise (after a good sleep) and start your day with drinking pure water, enough to fill your stomach (2 or 3 large cups). Let the water settled in your body (about 42 minutes) before you eat or drink something else. Better before any spiritual meditation to allow the spiritual energy to connect to the water in your body.
The reason for that is that pure water, was the first “material” thing in this world. It came out from the “mouth” of God in the act of creation. Any other type of food/nutrition include a process, which is interference.
Everything follows a beginning.
(This is not a medical advice or whatever. Ask a your certified professional for advice.)
מקור הקטע: הקדמת תיקוני הזוהר עם פרוש מעלות הסולם (רבי יהודה צבי ברנדויין זל) פסקה 235