The former England international revealed boss Sherwood wants to build his team around the 20-year-old as they battle for survival
Villa are second bottom in the Barclays Premier League and four points from safety with Sherwood under increasing pressure at Villa Park
Grealish has broken into the first team under Sherwood and Cole, who joined Sky Bet League One side Coventry on loan last week, reckons the midfielder can handle their relegation fight and aid the manager.
"West Ham were constantly in a relegation battle when I was coming through," said the 33-year-old, who is preparing to make his Sky Blues debut at Rochdale on Tuesday.
"It's sink or swim
The gaffer loves him
He wants to give him that time to build the team around him
"Jack is a good lad and now he is getting into that stage where he has gone beyond potential and is an important cog in the wheel at Villa
That is a different stage of his career now - it becomes expectancy and is a different way of dealing with it.
"When you step into that world of Premier League football the expectancy levels are massive and someone with the ability levels of Jack, the expectancy levels go up so you need to have the mentality to cope.
"He is going to be a massive player for Villa over the future
It is important that the club build the team around him
I think they have the perfect gaffer for him."
Villa are without a league win since the opening day and have picked up just one point from their last 24 ahead of Saturday's visit of Swansea
They lost 2-0 at Chelsea on Saturday but Cole backed Sherwood to keep them in the top flight
He said: "The manager has a lot of qualities he brings to the table and he is also getting better everyday
He is learning the trade himself
But he is definitely good enough to keep Villa up and I can see the players getting better and the manager getting better."
Source : PA