Within your mind, there are hardly any lines at all. All its contents flow into each other, sensations becoming thoughts, feelings, desires, actions, and more sensations. This stream of consciousness correlates with a cascade of fleeting neural assemblies, each assembly dispersing into the next one[.]
Taking in the good is not about putting a happy shiny face on everything, nor is it about turning away from the hard things in life. It's about nourishing well-being, contentment, and peace inside that are refuges you can always come from and return to.
The point is not to resist painful experiences or grasp at pleasant ones: that's a kind of craving - and craving leads to suffering. The art is to find a balance in which you remain mindful, accepting, and curious regarding difficult experiences - while also taking in supportive feelings and thoughts.