When you stretch a rubber band it reaches a certain point and it suddenly snaps. This is called the breaking point. A certain amount of force is required to reach breaking point. You can apply as much pressure as you want but as long as the breaking point has not been reached the rubber band will never break.
This idea of breaking point applies to life as well. There is only so much abuse a spouse will take before they leave a marriage. A certain amount of time and practice is required to become an expert in any field. A certain amount of time and effort is required to push a business venture to profitability.
Everything has a breaking point. We just have to apply enough pressure to overcome the resistance and reach breaking point.
Beyond breaking point the amount of effort required is negligible. I hope you are patient enough to persevere till you reach breaking point.