biblical faith not modern self-confidence

Often we hear the word "faith" used for what amounts to "confidence," even "self-confidence". Is there a difference between Biblical Faith and Modern Confidence? I think there is quite a difference...one worth contemplating. Here are a couple of definitions for the word "confidence":

Dictionary.com Unabridged (v 1.1)
con•fi•dent
–adjective
1. having strong belief or full assurance; sure: confident of fulfillment.
2. sure of oneself; having no uncertainty about one's own abilities, correctness, successfulness, etc.; self-confident; bold: a confident speaker.
3. excessively bold; presumptuous.
4. Obsolete. trustful or confiding.
–noun
5. a confidant.
[Origin: 1570–80; < L confīdent- (s. of confīdéns), prp. of confīdere. See confide, -ent]

—Related forms
con•fi•dent•ly, adverb

—Synonyms 1. certain, positive. See sure. 2. self-reliant, assured, intrepid.
—Antonyms 2. modest, diffident.
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © R


Look at the 2 examples below. On one hand entry #1 (confidence in another person)is translated in modern greek with the "pistos" root. On the other hand entry #2 which has more to do with being self-assured or self-confident is translated into modern greek with the "peitho" root.

1) Confidence noun
trust or belief in someone's ability
Example: I have great confidence in you.
Greek: εμπιστοσύνη

2) Confidence noun
belief and faith in one's own ability
Example: She shows a great deal of confidence for her age.
Greek: αυτοπεποίθηση
Dictionary.com Unabridged (v 1.1)

Certainly we should recognize the distinction between biblical "faith" in God and what many people today mean by "faith" as a kind of "self-confidence". I like this statement found in Kittle's vi,pg.198.

In the OT to believe in God is to acknowledge Him as such. This includes trust and hope, fear and obedience. But these are a unity, since trust is taken radically and thus includes the overcoming of anxiety and self-confidence