Yoniso manasikāra is a key concept in Buddhism that translates to "wise attention" or "systematic attention." It refers to the process of skillfully and carefully observing one's experiences, thoughts, and feelings, rather than reacting to them habitually or superficially.

It's about looking beneath the surface of things to understand their true nature, particularly in terms of impermanence (anicca), suffering (dukkha), and non-self (anatta).

Here's a breakdown of what it involves:

• Careful Observation: Instead of just experiencing something, you're actively paying attention to how it arises, how it changes, and how it ceases.
• Discernment: You're distinguishing between what is wholesome and unwholesome, what leads to liberation and what leads to suffering.
• Rooted in Wisdom: It's not just about paying attention, but paying attention with the intention of developing insight and understanding. This often means applying the teachings of the Buddha to your experience.
• Reflecting on Causes and Conditions: Instead of getting caught up in the immediate feeling, you're looking at what led to that feeling and what might arise from it.

Essentially, yoniso manasikāra is the mental faculty that allows a practitioner to engage with their experience in a way that leads to liberation from suffering. It's often contrasted with ayoniso manasikāra, which is unwise or unskillful attention, leading to further delusion and suffering.