Be Truthful: no lies, no exaggerations, no manufactured helplessness

Say what is actually true — including when the truth is "I don’t want to" rather than "I can’t."

Why it works

Lying or exaggerating — even in small, socially comfortable ways — has two costs: it leaves the self-concept with a small deficit each time, and it creates a frame that doesn’t match reality, making the interaction harder to navigate honestly. "I can’t come" (when you mean "I don’t want to") specifically trains both parties that your limits are capability-based rather than preference-based, which tends to produce challenge-and-workaround dynamics rather than acceptance. Saying "I’m choosing not to" is more honest and often more respected.

How to do it

1. Check statements for capability framing that is actually preference framing: "I can’t" vs. "I’m not going to."
2. When declining, be honest about the real reason if you are comfortable — or simply honest about not sharing: "It doesn’t work for me" is complete and true.
3. Resist exaggerating distress to obtain compliance: "This is literally destroying me" for a moderate inconvenience trains the other person to discount your actual crises.

Evidence

Honesty is associated with lower psychological distress and stronger interpersonal trust; deception — including well-intentioned social lies — is associated with relationship quality erosion over time in communication research. (observational)

The evidence is on honesty and disclosure generally; the specific cost of small capability-framing lies to self-respect is a clinical observation rather than a separately studied finding.

Sources

• Kelly & McKillop (1996), consequences of revealing personal secrets, Psychological Bulletin

Common mistake

Confusing honesty with bluntness — FAST’s Truthful applies to what you say, not how you say it; the GIVE skill covers how to be honest while remaining gentle.