It is very important to be able to say "NO" the right way. Once you learn this ability you will have more control of your life (as we'll explain).
Keep it 100 quote: "Real freedom is finding the right restrictions (boundaries)." - Tim Keller
Article on Boundaries: http://www.faithgateway.com/boundaries-when-to-say-yes-say-no/
Book link: https://www.christianbook.com/boundaries-when-take-control-your-life/henry-cloud/9780310351801/pd/351804?event=ESRCG