Any methodology for developing patience requires a multi-tiered approach.
That's why it's called a practice. We have to practice a practice if it is to be of value.
We need never be bound by the limitations of our previous or current thinking, nor are we ever locked into being the person we used to be, or think we are.
Suffering usually relates to wanting things to be different from the way they are.
The practice of lovingkindness can uplift us & relieve sorrow & unhappiness.
Patience is the direct antithesis of anger.