That’s a thoughtful and powerful seminar theme—balancing inner meaning with critical thinking. It already sounds strong, but here are a few polished versions and ways you could build it out:

Refined title options:

• Bringing the Best of Both Worlds: Spiritual Depth & Intellectual Curiosity
• Where Spirit Meets Mind: Cultivating Depth and Curiosity
• Deep Roots, Open Minds: Integrating Spirituality and Intellectual Growth

Tagline ideas:

• “Menemukan makna hidup tanpa berhenti bertanya.”
• “Berpikir kritis, tetap bernilai.”
• “Inner peace meets active thinking.”

Key message you can highlight:
Spiritual depth gives direction, purpose, and values—while intellectual curiosity drives learning, questioning, and growth. When combined, they help someone become not only knowledgeable, but also wise.

Simple seminar flow:

1. Opening:
   Why balance is important (avoiding being too rigid or too lost in questioning)
2. Session 1 – Spiritual Depth:
   Reflection, values, purpose, self-awareness
3. Session 2 – Intellectual Curiosity:
   Critical thinking, asking questions, exploring ideas
4. Session 3 – Integration:
   How to stay grounded while staying curious
5. Closing:
   Practical habits (journaling, reading, discussion, reflection)