The answer is absolutely yes. If we agree with the overall definition of work according to the greek word for work ergon:
See strongs # 2041:
- business, employment, that which any one is occupied
- that which one undertakes to do, enterprise, undertaking
- any product whatever, any thing accomplished by hand, art, industry, or mind
- an act, deed, thing done: the idea of working is emphasised in opp. to that which is less than work
A work is anything done, accomplished by #1 hand, #2 art, #3 industry, #4 or MIND
The mind is :
(in a human or other conscious being) the element, part, substance, or process that reasons, thinks, feels, wills, perceives, judges, etc.
Psychology. the totality of conscious and unconscious mental processes and activities.
So believing something via the mental activity and process of reasoning is work. The process of decision making is a activity, work of the mind.
Now for instance, the sin of hatred Gal 5:19-20
Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,
20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies,
How is that sin committed ? It starts in the mind or heart ! Yet in Vs 19 its stated as an work of the flesh
So activity in and with the mind/heart is a work, this cannot be denied..
Now believing is either a work of the flesh [unregenerate] or of the Spirit [ regenerated]
But now Salvation is not by works, Neither by works of the flesh or works of the Spirit.
Believing takes work
Did God or Moses part the Red Sea?
God did, but it did take work for Moses to obey God's instructions. Moses had to raise his staff etc.
Exodus 14
13 And Moses said unto the people, Fear ye not, stand still, and see the salvation of the Lord, which he will shew to you to day: for the Egyptians whom ye have seen to day, ye shall see them again no more for ever.
14 The Lord shall fight for you, and ye shall hold your peace.
15 And the Lord said unto Moses, Wherefore criest thou unto me? speak unto the children of Israel, that they go forward:
16 But lift thou up thy rod, and stretch out thine hand over the sea, and divide it: and the children of Israel shall go on dry ground through the midst of the sea.
Unless Moses did as commanded, Moses would not have done the works to let God work.
Who did the heavy lifting? God? or Moses?