Promising

Definition: (1) having reasonable grounds for hope; (2) likely to succeed or yield favorable results; just expectations of a good outcome

Synonyms: assuring, auspicious, engaging

Quotes:
• Grow in the root of all grace, which is faith. Believe God’s promises more firmly than ever. Allow your faith to increase in its fullness, firmness, and simplicity. — Charles Haddon Spurgeon (1834-1892) English Baptist preacher
An almost indispensable skill for any creative person is the ability to pose the right questions. Creative people identify promising, exciting, and, most important, accessible routes to progress – and eventually formulate the questions correctly. — Lisa Randall (1962-) American theoretical physicist

Admonition: Live up to your promises.